EP 3560201 B1 20230510 - METHOD AND APPARATUS FOR RANGE DERIVATION IN CONTEXT ADAPTIVE BINARY ARITHMETIC CODING
Title (en)
METHOD AND APPARATUS FOR RANGE DERIVATION IN CONTEXT ADAPTIVE BINARY ARITHMETIC CODING
Title (de)
VERFAHREN UND VORRICHTUNG ZUR BEREICHSABLEITUNG IN KONTEXTADAPTIVER BINÄRER ARITHMETISCHER CODIERUNG
Title (fr)
PROCÉDÉ ET APPAREIL D'OBTENTION DE PLAGES EN CODAGE ARITHMÉTIQUE BINAIRE S'ADAPTANT AU CONTEXTE
Publication
Application
Priority
- US 201762443012 P 20170106
- US 201815863547 A 20180105
- CN 2018071740 W 20180108
Abstract (en)
[origin: US2018199046A1] A method and apparatus of entropy coding of coding symbols using Context-Based Adaptive Binary Arithmetic Coder (CABAC) are disclosed. According to the present invention, CABAC encoding or decoding is applied to a current bin of a binary data of a current coding symbol according to a current probability for a binary value of the current bin and a current range associated with the current state of arithmetic coder. An LPS probability index corresponding to an inverted current probability or the current probability is derived depending on whether the current probability is greater than 0.5. A range index is derived for identifying one range interval containing the current range. An LPS range is then derived using one or more mathematical operations comprising calculating a multiplication of a first value related to the LPS probability index and a second value related to the range index n.
IPC 8 full level
H03M 7/40 (2006.01); H04N 19/91 (2014.01)
CPC (source: EP US)
H03M 7/4006 (2013.01 - US); H03M 7/4018 (2013.01 - EP US); H04N 19/13 (2014.11 - US); H04N 19/157 (2014.11 - US); H04N 19/192 (2014.11 - US); H04N 19/91 (2014.11 - EP US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
US 11265561 B2 20220301; US 2018199046 A1 20180712; BR 112019013916 A2 20200204; BR 112019013916 A8 20230207; CN 110291793 A 20190927; CN 110291793 B 20220125; EP 3560201 A1 20191030; EP 3560201 A4 20200812; EP 3560201 B1 20230510; MX 2019008186 A 20190909; PL 3560201 T3 20230828; TW 201832554 A 20180901; TW I681665 B 20200101; WO 2018127167 A1 20180712; ZA 201905142 B 20221221
DOCDB simple family (application)
US 201815863547 A 20180105; BR 112019013916 A 20180108; CN 2018071740 W 20180108; CN 201880006060 A 20180108; EP 18736507 A 20180108; MX 2019008186 A 20180108; PL 18736507 T 20180108; TW 107100636 A 20180108; ZA 201905142 A 20190802